Re: [PATCH v2 18/23] clk: mediatek: clk-mtk: Register MFG notifier in mtk_clk_simple_probe()

[Chen-Yu Tsai]

On Thu, Dec 29, 2022 at 4:21 PM Miles Chen <miles.chen@xxxxxxxxxxxx> wrote:
>
> >In preparation for commonizing topckgen probe on various MediaTek SoCs
> >clock drivers, add the ability to register the MFG MUX notifier in
> >mtk_clk_simple_probe() by passing a custom notifier register function
> >pointer, as this function will be slightly different across different
> >SoCs.
> >
> >Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
> >---
> > drivers/clk/mediatek/clk-mtk.c | 8 ++++++++
> > drivers/clk/mediatek/clk-mtk.h | 3 +++
> > 2 files changed, 11 insertions(+)
> >
> >diff --git a/drivers/clk/mediatek/clk-mtk.c b/drivers/clk/mediatek/clk-mtk.c
> >index b0a6225cd7b2..df6281492fb6 100644
> >--- a/drivers/clk/mediatek/clk-mtk.c
> >+++ b/drivers/clk/mediatek/clk-mtk.c
> >@@ -533,6 +533,14 @@ int mtk_clk_simple_probe(struct platform_device *pdev)
> >                       goto unregister_composites;
> >       }
> >
> >+      if (mcd->clk_notifier_func) {
> >+              struct clk *mfg_mux = clk_data->hws[mcd->mfg_clk_idx]->clk;
> >+
> >+              r = mcd->clk_notifier_func(&pdev->dev, mfg_mux);
> >+              if (r)
> >+                      goto unregister_clks;
> >+      }
>
> Should we have a IS_ERR_OR_NULL() check for clk_data->hws[mcd->mfg_clk_idx]?

With a big warning to signal that something in the driver isn't written
correctly, such as no MFG clock actually being included in the driver.

ChenYu